"Trump on Jan. 20: 'I will faithfully execute the Office of President of the United States, and will to the best of my ability, preserve, protect and defend the Constitution of the United States.' Trump today: 'I don't know,'" another person wrote.

We have thousands of people that are some murderers, and some drug dealers, and some of the worst people on earth...I was elected to get them the hell out of here, and the courts are holding me from doing it.

Donald Trump said 'I don't know' when he was asked if it is his job to uphold the U.S. Constitution as the president during a new interview with Kristen Welker for 'Meet the Press,' as he reflected on his first 100 days in office for his second term.